钻石的重量是钻石最主要的评价因素，通常钻石重量用克拉(ct)表示，标准的1克拉=200毫克=0.2克、1克拉=100分。

虽然钻石的切割工艺各异，但是钻石直径和重量之间还是有一个大概的比例，本期盒子君就与大家分享一下，钻石的直径与钻石重量的示意图与对照表!

收藏这份表单，轻松get钻石直径与重量的关系~

1.标准切工圆形钻石直径与重量关系示意图

2.圆形裸钻直径（毫米/mm）与重量（克拉/ct）对照表

重量CT

直径

0.01

1.40mm

0.02

1.76mm

0.03

2.02mm

0.04

2.22mm

0.05

2.39mm

0.06

2.54mm

0.07

2.67mm

0.08

2.80mm

0.09

2.91mm

0.10

3.01mm

0.11

3.11mm

0.12

3.20mm

0.13

3.29mm

0.14

3.37mm

0.15

3.45mm

0.16

3.52mm

0.17

3.60mm

0.18

3.66mm

0.19

3.73mm

0.20

3.80mm

0.21

3.86mm

0.22

3.92mm

0.23

3.98mm

0.24

4.03mm

0.25

4.09mm

0.26

4.14mm

0.27

4.19mm

0.28

4.25mm

0.29

4.30mm

0.30

4.34mm

0.31

4.39mm

0.32

4.44mm

0.33

4.48mm

0.34

4.53mm

0.35

4.57mm

0.36

4.62mm

0.37

4.66mm

0.38

4.70mm

0.39

4.74mm

0.40

4.78mm

0.41

4.82mm

0.42

4.86mm

0.43

4.90mm

0.44

4.94mm

0.45

4.97mm

0.46

5.01mm

0.47

5.05mm

0.48

5.08mm

0.49

5.12mm

0.50

5.15mm

重量CT

直径

0.51

5.19mm

0.52

5.22mm

0.53

5.25mm

0.54

5.28mm

0.55

5.32mm

0.56

5.35mm

0.57

5.38mm

0.58

5.41mm

0.59

5.44mm

0.60

5.47mm

0.61

5.50mm

0.62

5.53mm

0.63

5.56mm

0.64

5.59mm

0.65

5.62mm

0.66

5.65mm

0.67

5.68mm

0.68

5.71mm

0.69

5.73mm

0.70

5.76mm

0.71

5.79mm

0.72

5.82mm

0.73

5.84mm

0.74

5.87mm

0.75

5.90mm

0.76

5.92mm

0.77

5.95mm

0.78

5.97mm

0.79

6.00mm

0.80

6.02mm

0.81

6.05mm

0.82

6.07mm

0.83

6.10mm

0.84

6.12mm

0.85

6.15mm

0.86

6.17mm

0.87

6.20mm

0.88

6.22mm

0.89

6.24mm

0.90

6.27mm

0.91

6.29mm

0.92

6.31mm

0.93

6.33mm

0.94

6.36mm

0.95

6.38mm

0.96

6.40mm

0.97

6.42mm

0.98

6.45mm

0.99

6.47mm

1.00

6.49mm

重量CT

直径

1.02

6.53mm

1.04

6.58mm

1.06

6.62mm

1.08

6.66mm

1.10

6.70mm

1.12

6.74mm

1.14

6.78mm

1.16

6.82mm

1.18

6.86mm

1.20

6.90mm

1.22

6.93mm

1.24

6.97mm

1.26

7.01mm

1.28

7.05mm

1.30

7.08mm

1.32

7.12mm

1.34

7.16mm

1.36

7.19mm

1.38

7.23mm

1.40

7.26mm

1.42

7.29mm

1.44

7.33mm

1.46

7.36mm

1.48

7.40mm

1.50

7.43mm

1.52

7.46mm

1.54

7.49mm

1.56

7.53mm

1.58

7.56mm

1.60

7.59mm

1.62

7.62mm

1.64

7.65mm

1.66

7.68mm

1.68

7.72mm

1.70

7.75mm

1.72

7.78mm

1.74

7.81mm

1.76

7.84mm

1.78

7.87mm

1.80

7.89mm

1.82

7.92mm

1.84

7.95mm

1.86

7.98mm

1.88

8.01mm

1.90

8.04mm

1.92

8.06mm

1.94

8.09mm

1.96

8.12mm

1.98

8.15mm

2.00

8.18mm

重量CT

直径

2.05

8.24mm

2.10

8.31mm

2.15

8.38mm

2.20

8.44mm

2.25

8.50mm

2.30

8.57mm

2.35

8.63mm

2.40

8.68mm

2.45

8.75mm

2.50

8.81mm

2.55

8.87mm

2.60

8.92mm

2.65

8.98mm

2.70

9.01mm

2.75

9.09mm

2.80

9.15mm

2.85

9.20mm

2.90

9.26mm

2.95

9.31mm

3.00

9.36mm

3.10

9.46mm

3.20

9.56mm

3.30

9.66mm

3.40

9.76mm

3.50

9.85mm

3.60

9.95mm

3.70

10.04mm

3.80

10.13mm

3.90

10.22mm

4.00

10.39mm

4.10

10.69mm

4.20

10.47mm

4.30

10.55mm

4.40

10.63mm

4.50

10.71mm

4.60

10.79mm

4.70

10.87mm

4.80

10.95mm

4.90

11.02mm

5.00

11.10mm

5.50

11.46mm

6.00

11.79mm

6.50

12.11mm

7.00

12.41mm

7.50

12.70mm

8.00

12.98mm

8.50

13.24mm

9.00

13.50mm

9.50

13.75mm

10.00

13.98mm

（资料来源于网络）